TASK: Provide sys_language_uid

Fetch sys_language_uid from database.
Until now we did not fetch system related fields from database. As there
is now a RemoveProcessor, integrators are able to remove fields.
Also providing this field enables basic multi language support.

Relates: #25

Classes/Domain/Index/TcaIndexer/TcaTableService.php

@@ -231,7 +231,6 @@ class TcaTableService
             $this->tca['ctrl']['cruser_id'],
             $this->tca['ctrl']['fe_cruser_id'],
             $this->tca['ctrl']['fe_crgroup_id'],
-            $this->tca['ctrl']['languageField'],
             $this->tca['ctrl']['origUid'],
         ];
 

Documentation/source/changelog.rst

@@ -5,6 +5,7 @@ Changelog
    :maxdepth: 1
    :glob:
 
+   changelog/20180409-25-provide-sys-language-uid
    changelog/20180408-131-respect-page-cache-clear
    changelog/20180408-introduce-php70-type-hints
    changelog/20180406-120-facet-configuration

Documentation/source/changelog/20180409-25-provide-sys-language-uid.rst

@@ -0,0 +1,16 @@
+FEATURE 25 "Respect multiple languages" - Provide sys_language_uid
+==================================================================
+
+Previously we did not fetch ``sys_language_uid`` field from database. This prevented everyone from
+working with multiple languages.
+By not removing the field it gets indexed and provides a very basic way of implementing multiple
+languages.
+At least it's now possible to filter search results by current language for now. Still the records
+are not "valid" as we do not add overlays for now.
+
+This is a first step into full multi language support.
+
+Martin Hummer already has a basic proof of concept, based on :ref:`concepts_dataprocessing` working,
+depending on ``sys_language_uid``.
+
+See :issue:`25`.

Tests/Unit/Domain/Index/TcaIndexer/TcaTableServiceTest.php

@@ -108,10 +108,14 @@ class TcaTableServiceTest extends AbstractUnitTestCase
     {
         $GLOBALS['TCA']['test_table'] = [
             'ctrl' => [
-                'languageField' => 'sys_language',
+                'languageField' => 'sys_language_uid',
             ],
             'columns' => [
-                'sys_language' => [],
+                'sys_language_uid' => [
+                    'config' => [
+                        'type' => 'select',
+                    ],
+                ],
                 't3ver_oid' => [],
                 'available_column' => [
                     'config' => [
@@ -141,6 +145,7 @@ class TcaTableServiceTest extends AbstractUnitTestCase
             [
                 'test_table.uid',
                 'test_table.pid',
+                'test_table.sys_language_uid',
                 'test_table.available_column',
             ],
             $subject->getFields(),